Borderlines
(borderline 的复数) n. 边界, 界线\\na. 边界的
🗣️ 情景例句
Don't open the door if you don't know who it is.
如果有陌生人敲门不要开门。
Most things have two handles.
大多数事物总有两种解释。
The temperature will stay above zero in the day-time, but at night it will fall below zero again.
白天气温保持在零度以上，但夜间仍会降至零下。